--- Why do more and more people start to use new types of energy？--- Because they cost_____and are good for the environment.
Aless
Bcheaper
Clower
Dmore
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Why do more and more people start to use new types of energy？--- Because they cost_____and are good
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0, and it has grown very fast.Walking and bicycle clubs use the forest,and there are programs for ch
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0, and it has grown very fast.Walking and bicycle clubs use the forest,and there are programs for ch